# Math Memory Test vs Human Heroes Einstein’s Clock

The clearest difference is iOS requirement: Math Memory Test at 6.0 against Human Heroes Einstein’s Clock's 12.1. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Math Memory Test | Human Heroes Einstein’s Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.6 (35 ratings)](https://appshunter.io/ios/app/human-heroes-einsteins-clock/id1463380511/reviews)** |
| Number of ratings | — | **35** |
| Positive reviews | — | 82.8% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 2 months |
| Monetization | — | Free |
| Size | 57 MB | 183 MB |
| Requires iOS | **6.0** | 12.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ayesha Yasser](https://appshunter.io/developer/1141416285) | [Human Heroes Ltd](https://appshunter.io/developer/1442853426) |

## What reviewers say

### Math Memory Test

[App page](https://appshunter.io/ios/app/math-memory-test-fun-learning-quiz-for-kids-2017/id1237666755)

**Features:** macOS Compatibility

**In-app purchases:** none


### Human Heroes Einstein’s Clock

[App page](https://appshunter.io/ios/app/human-heroes-einsteins-clock/id1463380511)

Learn to tell time with an interactive 3D Albert Einstein, voiced by Stephen Fry. This free app offers 8 levels of clock-reading challenges, with visual and verbal guidance to help children master time concepts. It's an engaging introduction to the Human Heroes educational series.

**Highlights:** Interactive 3D Albert Einstein character, Voiced by Stephen Fry, 8 levels of clock-reading practice, O'Clock, quarter, half, past, and to time concepts, On-screen visual and verbal guidance, Offline play

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Math Memory Test free?

Math Memory Test is free to download, with no in-app purchases.

### Is Human Heroes Einstein’s Clock free?

Human Heroes Einstein’s Clock is free to download, with no in-app purchases.

### Do Math Memory Test or Human Heroes Einstein’s Clock have ads?

Neither Math Memory Test nor Human Heroes Einstein’s Clock shows ads.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*